18363013 has 8 divisors (see below), whose sum is σ = 18733176. Its totient is φ = 17995200.

The previous prime is 18363011. The next prime is 18363029. The reversal of 18363013 is 31036381.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 368449 + 17994564 = 607^2 + 4242^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18363013 - 2¹ = 18363011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18363011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27795 + ... + 28447.

It is an arithmetic number, because the mean of its divisors is an integer number (2341647).

Almost surely, 2^18363013 is an apocalyptic number.

It is an amenable number.

18363013 is a deficient number, since it is larger than the sum of its proper divisors (370163).

18363013 is an equidigital number, since it uses as much as digits as its factorization.

18363013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 18363013 is about 4285.2086296935. The cubic root of 18363013 is about 263.8242105290.

Adding to 18363013 its reverse (31036381), we get a palindrome (49399394).

The spelling of 18363013 in words is "eighteen million, three hundred sixty-three thousand, thirteen".